Welding torch



Patented Apr. 19, 1927 MAN'FACTBLINGOMPEY, or enrcAe, Immers;'nj oonroianrron 'or TILL-mois."

WLDNG Yronden l Myinventibnis .concerned With Welding' torclies5anjd is designedto produce asiinple .andjrea'dily manufactured"structure ot the' class described that shall' be eXt-rernely etelent; "rn'operatlonr d v Mylnventi'on'is also Concerned with a torch' havlngone elernen't of the mixing mechanism"interchangeable? so that the torch through-the portion" of the torch'in whichv the rixhg ofthe igases' Occurs and l FiglV 8 is a' central"longitudinal' sectionVV tliroughi` a" mixing" nipplel haying the pas-1 My invention 1n 'ay 'beieinbodied in various formsv of ltorch, but' l; have lshown it as ern'- bodied 1in afcustorna'ry' `torrn in which the' handle'10 is1 'orrned' of a tube secured at its rear end'upon'avalye piecell and at its' front' 'enden' afhead4 piece 12,`the valve 'piece 11 having" the",custoznaryjoxygen :Valve 13y wrholrcontrols the passage leading'through the yalvefl piece' 11 and into 'the tube 14 threaded"thereint; While the acetylene vValveV 15 similarly 'controls a, pssagethrough the'V y valve piece 1'1 and'eonnected to the acetylene tuberi@ threaded ther'einto.

The *tubes 14 and E16 are threaded'at their" other endsinto A,the headpiece' 1 2, whichJ may i Vbe of any inustl bef p nut 17 which has` the internal annular sh'oul-Y der 18, and ispre'r'erably provided with the lmurled portions '19 rto1' turning"by hand and wth' the' h'eKa-'gona'lportmn' 20 to receive a Wrench. "The head ieee 12 hasthe annular' seati'21. fori'fed on "lts -lorward enbandj adapted to Ctmp'erate with therounded end 22 'of the tubular':member "2B which; as ,y shown; 'constitutes' za 'vp'artof the connections between" the' inixer'land the nozzle 24C troni lof changing i fdes'ire'd exterior conlforrnafy tion,`except that' the vforward 'portion thereo't threaded to receive the 'connecting' clamp' all Athe "p arts Y 2;1925.' 'serial No. 72,699.

Whichthe gas niixtur'e for the'flaine issuesvr in the customary inanner'. The tubular lcon-V nection is illustra-teclas connected to the nozzle 24e' by the tube 25, all of which con? nections may be of any desired construction.

The head piece 12 Within the seatV 21 is pro- Y Vide'dwth the enlargement or annular chain# ber 26 lWhich is connected by thelpassage`27 with theacetylenepipe 16. "l/"Vithin"l the'enlargement 26 is a reduced internally thread'- ed portion 28, the inner end of which is conl nectedbythe passage29 with the :of'ygen tudinalY passage 31Y extendingY centrally there-l through and preferably flared', as'seena't 32,'

'tube'lL The nipple 30 has the sinalllngiat its inner end, which is externally thread i' ed so'as to be tightly screwed 'into theiipolr-` tion 28 of' the head piece.` The nipple has' 'the greatest diameter toward itsicentral pori tion7 andthe "shoulder" 33 l is; preferably" formed 'thereon to cooperatev with 'the inner portion' o t" the Y 'seat' 21,:r and determine' the l exafct'positlon of the'nipple relative to thef" enlargement 265 this exact 'positioning being 1;

desirable td ensurel thel outer endsV of the' tine` transverse and preferably 'slightly inclinedpassageslt ormed'in the 'nipple' registering-` With the enlarge1nent,' as'shoWn.'v

ate with bthe complementary harige '18 ornedy YenedI up', 'the jointbetw'een the surfaces 21 and"22 will be gas tight.`n The"curyatur e given to the'surtaee`22 lenables inev to' secure The tubular member 25V hasthel annular'f4 flange' formed on tsinner end to cooper'-l on the'nut'17 so that* When thenut istightf" a tight'it,even il' there should be a slight' 'Vari ation betweenthe :ies ot the handle and the'connectl'on 23; 'Themternalbore ofthe connection 255 preferably reduced by tornl'- ingV the shoulder at 2567 said 'shoulder -corref sponding;l Vtoy the similarx shulder 37' fornred' by a reduetion in the diameter ot the iuppley 30, the 'reduced' outer"portionA of which titsl snuglyi'in the 'correspondingly reducedV Vportlono't the boreot the connectingtube'23.

rlhe outerend the nipple?,` is preferably tapered, as shown, and plus the internal i taper 353 orinedfin the tubular connection 23 and lea-ding Ato the reduced bore through .which 'theunixed gases pass' on through the part`25 tothe nozzle 24;

l 'lheoperation oit my? ixnprovedtorch will 4 1' be readily'xapparent: Whenpthe partsare '"assembledgturning the'eonn'ectingnut 17 Will*y together tightly, and" the nipple and having its llanged end engaging the seat, and a connecting nut screwed onto the head piece and having an annular internal shoulder engaging the flange of the tubular member, said tubular member having its internal diameter beyond the nipple reduced but larger than that of the longitudinal passage through the nipple, substantially as and for the purpose described.

5. In a device ot' the class described, the combination With a head piece provided with two inlets and having a threaded eX- terior and in one end of its interior a seat Within Which there is an enlargement and a threaded connection with one of said inlets, the other being connected With the enlargement, of a plurality of nipples each having a longitudinal passage therethrough and one end threaded to be screwed into the threaded connection and having tine transverse passages registering` exteriorly with the enlargement and opening at their inner ends into the longitudinal passage, a tubular member surrounding the nipple and having its flange end engaging the seat, and a connecting nut screwed onto the head piece and having an annular internal shoulder engaging the flange of the tubular member, said nipples having their passages of different sizes for different sized {iames and adapted to be connected one at a time in the head piece, substantially as and for the purpose described.

In Witness whereof, I have hereunto set my hand this 18th day oi' November, 1925.

ROBERT D. MCINTOSH. 

